49, been in T injections for 5 weeks.

Hi, I'm 49, had Physical and first time I was ever tested for T. Came back as 96 and Dr asked me if I could give myself a injection, I never have, but when I found out it only cost $10 every 2 weeks(that is with syringes to draw and inject). I decided to give it a try. I'm on Watson(200mg/1ml), I take 2ml every 2 weeks, so 400mg. Other than a good mental feeling the first week, muscles feel more pumped up? (Can't explain ) better sex drive, but after a few weeks on T, now I feel maybe more drained than before. I inject into my upper leg. Not sure, but after 5 weeks I would think my energy would be better.